Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Officer	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Total rent expense	$ 10,324,000	$ 10,695,000	$ 9,385,000
Future minimum rental payments under operating leases [Abstract]
2013	7,531,000
2014	6,717,000
2015	5,686,000
2016	3,592,000
2017	2,259,000
Thereafter	2,221,000
Total	28,006,000
Warranty expense	78,100,000	76,500,000	63,500,000
Changes in product warranties [Roll forward]
Balance, beginning of period	17,288,000	13,500,000
Liabilities accrued for current year sales	78,058,000	76,548,000
Settlement of warranty claims	(77,305,000)	(72,760,000)
Balance, end of period	18,041,000	17,288,000	13,500,000
Number of key officers	2
Financial Standby Letter of Credit [Member]
Changes in product warranties [Roll forward]
Outstanding letters of credit with certain vendors	4,600,000
Real Estate [Member]
Loss Contingencies [Line Items]
Total rent expense	7,841,000	7,829,000	7,195,000
Other [Member]
Loss Contingencies [Line Items]
Total rent expense	2,483,000	2,866,000	2,190,000
Asbestos [Member]
Changes in product warranties [Roll forward]
Pending claims, approximate number	2,280
Reimbursement from insurance carrier for settled claims	14,900,000
Range of possible loss, minimum	27,400,000
Range of possible loss, maximum	48,100,000
Increase for low end of range	2,700,000
Decrease for high end of range	4,100,000
Asbestos [Member] | Minimum [Member]
Changes in product warranties [Roll forward]
Estimated legal costs	24,400,000
Asbestos [Member] | Maximum [Member]
Changes in product warranties [Roll forward]
Estimated legal costs	$ 37,400,000